Blatter was referring to the two obvious officiating errors: Frank Lampard's goal that was never awarded, even though the ball was over the goal line by a good yard in England's 4-1 loss to Germany; and Carlos Tevez's goal in Argentina's 3-1 win over Mexico that stood even though he was at least a yard offside.

"We cannot change anything with 10 games to go in the World Cup, but we will look again at technology, goal-line technology," Blatter told a reporters' round table in Johannesburg.

Blatter, who attended both matches, apologized to both teams.

"The English said 'Thank you.' " Blatter said. "The Mexicans, they just go with the head (nodding). I understand that they are not happy. It was not a five-star game for refereeing."

United States forward Landon Donovan, whose team twice had goals disallowed in the tournament on disputed calls, said soccer either needs more referees or instant replay.

"It's difficult because we know how fast the game is, and as a referee, you can't see everything," Donovan said Tuesday night on the "Late Show with David Letterman."

For what it's worth, FIFA sent home World Cup referee Koman Coulibaly of Mali - who disallowed a U.S. goal that would have given the Americans a win over Slovenia in the group stage - and officials responsible for the high-profile errors involving England and Mexico. Coulibaly, Uruguay's Jorge Larrionda, who denied Lampard's goal, and Italian Roberto Rosetti, who let Tevez's score stand, were among referees not selected for the quarterfinals and beyond. As teams are eliminated and the number of games declines, FIFA keeps the officials who have rated highest. Nineteen crews are left in South Africa for the remaining eight matches.